The way I read the Freestyle info, is that I should adjust using aperture -vs- time?

Although we tend to think in terms of longer shutter speeds when we consider reciprocity failure, the actual cause for that type of reciprocity failure is that the light that actually reaches the film is at a very low intensity. If you can increase the intensity of the light reaching the film, by using either more light on the scene or a larger aperture, the reciprocity may not fail.

Matt

“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2